You can change the font used for input and output cells in all notebooks to your preferred one, such as Courier, by evaluating the following:
This will undo these changes.
Note that the fonts used in mathematics typesetting are the supplied MathFonts. This setting cannot be changed.
To alter the styling of a given font, edit the input or output cell style in a stylesheet.
Here we demonstrate the procedure for input cells. The procedure for output cells is the same.
- From the menu bar, select Format ► Edit Stylesheet. A blank stylesheet opens.
- Under Choose a style, select the Input cell style and make sure the Input cell bracket is highlighted.
- Use the Format menu selection to edit the characteristics (Format ► Face or Background Color, for example). Here we change the font face to italic:
- Click the upper-right button, Install Stylesheet. An install dialog appears. Enter the stylesheet name and select who the users will be. Click OK to confirm.
Now this stylesheet is available under Format ► Stylesheet.
You may wish to make this stylesheet the default one for your Mathematica.